Below is a detailed, factual report based on available documentation and software analysis. If you encountered a request for a serial number, it may be from a scam, a cracked/pirated version claiming to be "exclusive," or confusion with another product (e.g., RAMMap, MemReduct, or commercial defrag tools).
He knew it wasn’t. Not anymore.
Websites like Wilders Security Forums and MSFN (Microsoft Software & News Forum) have threads dating back to 2014-2017 where developers distributed time-limited exclusive keys for beta testing. Some users later posted permanent serials when the company closed. Search: "CleanMem exclusive giveaway" site:msfn.org . cleanmem mini monitor serial number exclusive